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An organic geochemical analysis study was performed on nine oil samples and forty-three core extracted samples from Shahejie Formation reservoirs by GC-MS to elucidate the influence of biodegradation and charge mixing on molecular compositions. Biodegradation impacts many classes of compounds, but the ...
A wide range of geochemical parameter values from different components point to multiple oil charge mixing. The relationship between the absolute concentrations of n-alkanes to hopanes and hopanes to 25-NHs of the samples can qualitatively differentiate whether oil charge mixing occurs in reservoirs ...